RYA Yachtmaster Advanced Navigation 2

Question 1

What is a 'running fix' and when is it used?

Accepted Answer

A position fix obtained by taking a bearing of a single object, advancing the position line along the vessel's track, then taking a second bearing of the same or another object

Answer

A fix obtained while under engine power

Answer

A position obtained by running through shoal water

Answer

A GPS fix taken while the vessel is moving

Question 2

A depth sounding taken with an echo sounder shows 18.5 m. The tide height is 2.3 m. What is the charted depth at that position?

Accepted Answer

16.2 m

Answer

20.8 m

Answer

18.5 m

Answer

15.9 m

Question 3

When planning a cross-Channel passage from the UK to France, which publication gives standard port tidal predictions for English Channel ports?

Accepted Answer

Admiralty Tide Tables, Volume 1 (NP201)

Answer

UKHO Chart 5011 only

Answer

Almanac only — Admiralty tables are unnecessary

Answer

GMDSS handbook

Question 4

A vessel is approaching a headland with a tidal race. How should the skipper time the passage?

Accepted Answer

Arrive at or near slack water or when the stream is fair, before it builds to maximum rate

Answer

Arrive at maximum spring rate for fastest passage

Answer

Arrive at low water for greatest depths

Answer

Any timing is acceptable in a modern yacht

Question 5

What is a 'Secondary port difference' in tide tables and how is it applied?

Accepted Answer

A time and height correction listed in tables that, when applied to a standard port's prediction, gives the secondary port's tide

Answer

A tidal level unique to non-commercial ports

Answer

A correction applied only at spring tides

Answer

A chart correction for non-standard datum

Question 6

A cross-track error of 0.3 nm is acceptable on an open ocean crossing but not in a narrow channel. Why?

Accepted Answer

In a channel, margins are small and 0.3 nm of error could put the vessel on a bank or reef — accuracy requirements scale with the density of hazards

Answer

Narrow channels have stronger tides that increase error

Answer

GPS is less accurate in channels

Answer

The Yachtmaster standard requires zero error at all times